---
title: GoodFET20
---
<h1>GoodFET20</h1>

<p>The GoodFET20 is the third hardware revision of the GoodFET.  The
same board is also the basis of
the <a href="/hardware/badfet20">BadFET20</a>, which runs at 16MHz and
optionally glitches the voltage of target chips to bypass securiy
features.
</p>

<h2>CAD Files</h2>

<p>Eagle CAD 5.x files for the design can be found in
/branches/goodfet20 of the subversion repository, or as
<a href="/releases/goodfet20.zip">goodfet20.zip</a>.</p>

<h2>Bill of Materials</h2>

<table border="1">
<tr><td>Quantity</td><td>Package</td><td></td></tr>
<tr><td>1</td><td>SSOP28</td><td>FT232RL</td></tr>
<tr><td>1</td><td>QFP64</td><td>MSP430F1611 or 1612</td></tr>
<tr><td>2</td><td>0603</td><td>0.1&mu;F Decoupling Capacitors</td></tr>
<tr><td>3</td><td>0603</td><td>LED</td></tr>
<tr><td>2</td><td>0603</td><td>330R LED Series Resistors</td></tr>
<tr><td>6</td><td>0603</td><td>47K Pull-up Resistors (GoodFET only)</td></tr>
<tr><td>6</td><td>0603</td><td>100R JTAG Series Resistors</td></tr>
<tr><td>1</td><td>TC26H</td><td>32.768kHz Crystal</td></tr>
</table>

<h2>Construction</h2>

<p>Construct as described on the following Flickr image's annotations.
<a href="http://www.flickr.com/photos/travisgoodspeed/3800484079/"
title="GoodFET20 by Travis Goodspeed, on Flickr"><img
src="http://farm4.static.flickr.com/3593/3800484079_13fe591642.jpg"
width="500" height="115" alt="GoodFET20" /></a>
</p>

<h2>Errata</h2>

<p>The documentation previously specified a 32kHz crystal.
Use 32.768kHz, not 32.000kHz.</p>
